Probing a Redox Behavior of TiO2/SBA-15 Supported VxOy Catalyst Using an Electron Beam in a 200 kV Transmission Electron Microscope
| Autor: | Wei Zhang, Robert Schlögl, Till Wolfram, Bingsen Zhang, Dang Sheng Su, Lidong Shao |
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| Rok vydání: | 2011 |
| Předmět: |
Materials science
Oxide Vanadium chemistry.chemical_element Heterogeneous catalysis Photochemistry Redox Vanadium oxide Surfaces Coatings and Films Electronic Optical and Magnetic Materials Catalysis chemistry.chemical_compound General Energy Transition metal chemistry Transmission electron microscopy Physical and Theoretical Chemistry |
| Zdroj: | The Journal of Physical Chemistry C. 115:20550-20554 |
| ISSN: | 1932-7455 1932-7447 |
| Popis: | Supported vanadium oxides are becoming the model catalysts for. numerous selective oxidation reactions. To exploit redox chemistry of well-known titania-supported vanadia is currently one of the most fascinating topics. Herein, by applying in situ electron energy-loss spectroscopy, we succeeded in stimulating a new redox reaction in a routine transmission electron microscope; the electron beam can boost further oxidation from an amorphous lower-oxidation-state vanadia to maximal V(2)O(5) with an expense of oxygen from its support of TiO(2) to be reduced. Our findings could be extended into a new strategy: through utilizing an electron beam, and probing the redox chemistry between catalysts and their support in a wide class of heterogeneous catalyst systems, such as various oxide/oxide, metal/oxide, and oxide/metal catalysts. |
| Databáze: | OpenAIRE |
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